Just wanted to throw in my experiences with SS...
Bryan is a real standup guy that cares more about the customer and the community than money. I bought the original Cyborg with all the fixin's early this year and answered my over abundance of questions quickly and all times of the day/night and helped finding a couple random bolts and gaskets. As soon as I saw he had a new version of the Cyborg, it was a no-brainer. Same thing again, super fast turn around, great customer service and stood behind his product and rushed shipment when the machine shop messed up. So if you're even contemplating this turbo or working with Bryan, you'd be a fool not to.
I finished up install of the c39 this weekend along with a true 3" exhaust. I haven't had a chance to really put it through it's paces yet due to weather but here's one of my runs, untuned:
That should put the x37 vs c39 debate to rest. Now I'm waiting on some goodies and tune from DHM to post some actual numbers.